/* 
 * ------------------------------------------------------------------------
 *  Copyright by KNIME AG, Zurich, Switzerland
 *  Website: http://www.knime.com; Email: contact@knime.com
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License, Version 3, as
 *  published by the Free Software Foundation.
 *
 *  This program is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, see <http://www.gnu.org/licenses>.
 *
 *  Additional permission under GNU GPL version 3 section 7:
 *
 *  KNIME interoperates with ECLIPSE solely via ECLIPSE's plug-in APIs.
 *  Hence, KNIME and ECLIPSE are both independent programs and are not
 *  derived from each other. Should, however, the interpretation of the
 *  GNU GPL Version 3 ("License") under any applicable laws result in
 *  KNIME and ECLIPSE being a combined program, KNIME AG herewith grants
 *  you the additional permission to use and propagate KNIME together with
 *  ECLIPSE with only the license terms in place for ECLIPSE applying to
 *  ECLIPSE and the GNU GPL Version 3 applying for KNIME, provided the
 *  license terms of ECLIPSE themselves allow for the respective use and
 *  propagation of ECLIPSE together with KNIME.
 *
 *  Additional permission relating to nodes for KNIME that extend the Node
 *  Extension (and in particular that are based on subclasses of NodeModel,
 *  NodeDialog, and NodeView) and that only interoperate with KNIME through
 *  standard APIs ("Nodes"):
 *  Nodes are deemed to be separate and independent programs and to not be
 *  covered works.  Notwithstanding anything to the contrary in the
 *  License, the License does not apply to Nodes, you are not required to
 *  license Nodes under the License, and you are granted a license to
 *  prepare and propagate Nodes, in each case even if such Nodes are
 *  propagated with or for interoperation with KNIME.  The owner of a Node
 *  may freely choose the license terms applicable to such Node, including
 *  when such Node is propagated with or for interoperation with KNIME.
 * -------------------------------------------------------------------
 * 
 * History
 *   02.03.2006 (gabriel): created
 */
package org.knime.base.node.mine.bfn;

import javax.swing.JEditorPane;
import javax.swing.JScrollPane;

import org.knime.core.node.NodeView;
import org.knime.core.node.InvalidSettingsException;
import org.knime.core.node.ModelContentRO;
import org.knime.core.node.NodeLogger;


/**
 * View to display basisfunction rule models.
 * 
 * @author Thomas Gabriel, University of Konstanz
 * @param <T> the type of <code>BasisFunctionLearnerNodeModel</code>
 * 
 */
public class BasisFunctionLearnerNodeView
    <T extends BasisFunctionLearnerNodeModel> 
        extends NodeView<T> {
    
    private static final NodeLogger LOGGER = NodeLogger
            .getLogger(BasisFunctionLearnerNodeView.class);

    /** Here the model is displayed. */
    private final JEditorPane m_content;

    /**
     * Create an empty bf view.
     * 
     * @param model the bf model
     */
    public BasisFunctionLearnerNodeView(final T model) {
        super(model);
        m_content = new JEditorPane("text/html", "");
        m_content.setEditable(false);
        JScrollPane scroller = new JScrollPane(m_content);
        setComponent(scroller);
    }

    /**
     * Called when the model changed.
     * 
     * {@inheritDoc}
     */
    @Override
    public void modelChanged() {
        BasisFunctionLearnerNodeModel model = getNodeModel();
        ModelContentRO pp = model.getModelInfo();
        if (pp == null) {
            m_content.setText("");
        } else {
            StringBuilder buf = new StringBuilder();
            buf.append("<html>\n");
            buf.append("<body>\n");
            buf.append("<h2>Learner Statistics</h2>");
            getNextValue(pp, buf);
            buf.append("</body>\n");
            buf.append("</html>\n");
            m_content.setText(buf.toString());
        }
    }
    
    private void getNextValue(final ModelContentRO pp, 
            final StringBuilder buf) {
        for (String key : pp.keySet()) {
            String value = pp.getString(key, null);
            if (value == null) {
                try {
                    ModelContentRO nextCont = pp.getModelContent(key);
                    buf.append("<ul>");
                    getNextValue(nextCont, buf);
                    buf.append("</ul>");
                } catch (InvalidSettingsException ise) {
                    LOGGER.coding("Could not find model content for key: " 
                            + key, ise);
                }
            } else {
                buf.append("<li>" + key + " " + value + "\n</li>");
            }
        }
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void onClose() {

    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void onOpen() {

    }
}
